Zeta Librae


The Bayer designation ζ Librae, Latinised as Zeta Librae is shared by several star systems in the constellation Libra. Sources differ about the Flamsteed and Bayer designations that should be applied to four stars:
  • ζ1 Librae, known as HD 137744 and 32 Librae
  • ζ2 Librae, sometimes known as 33 Librae, or as HD 137949
  • ζ3 Librae, known as HD 138137 and 34 Librae
  • ζ4 Librae, known as HD 138485 and 35 Librae, often simply called ζ Librae
In light of the obvious confusion, the Bright Star Catalogue recommends the use of HR designations to unambiguously identify these four stars. ζ2 Librae does not have an HR number although it is included in the Bright Star Catalogue Supplement.